Posted by beachball on November 3, 2009, 3:10 am
I have a Honda Shadow VT1100C 1996 problem, when I accelerate and on a
certain rev count the bike is miss firing (losing power) when give
more petrol it go past the miss fire problem. I did replace sparkplugs
change petrol and oil filters but problem still exists. What else can
I check to rectify the problem?
Posted by little man upon the stair on November 3, 2009, 7:34 am
> I have a Honda Shadow VT1100C 1996 problem, when I accelerate and on a
> certain rev count the bike is miss firing (losing power) when give
> more petrol it go past the miss fire problem. I did replace sparkplugs
> change petrol and oil filters but problem still exists. What else can
> I check to rectify the problem?
You might just have dirty carburetors because of deposits left in the
idle jets and passages as the gasoline evaporates while the motorcycle
isn't ridden every day.
When the idle jets are slightly plugged up, the engine will run better
at higher RPM, but when the idle jets get completely plugged up, the
engine will start and run at idle, but will stall when you twist the
throttle because it really needs the gas from the idle jets to
accelerate when the throttle butterflies are only slightly open.
There are carburetor cleaners like GumOut and STP that are available
in an aerosol can. They contain strong solvents like acetone, toluene
and xylene.
You can spray four or five ounces of the cleaner into a measuring cup
and then pour the liquid into a full tank of gasoline and just ride
until the carbs are cleaned out.
My favorite carburetor cleaner is Berryman B12 Choke and Carburetor
Cleaner.
It comes in convenient liquid form and a 15 ounce can costs about
$3.50 at Wal*Mart.
Posted by TOG@Toil on November 3, 2009, 7:39 am
> I have a Honda Shadow VT1100C 1996 problem, when I accelerate and on a
> certain rev count the bike is miss firing (losing power) when give
> more petrol it go past the miss fire problem. I did replace sparkplugs
> change petrol and oil filters but problem still exists. What else can
> I check to rectify the problem?
At what revs is it misfiring? No way of making a meaningful carb
diagnosis without this info.
Has the bike been laid up for any length of time?
Posted by beachball on November 5, 2009, 3:20 am
> > I have a Honda Shadow VT1100C 1996 problem, when I accelerate and on a
> > certain rev count the bike is miss firing (losing power) when give
> > more petrol it go past the miss fire problem. I did replace sparkplugs
> > change petrol and oil filters but problem still exists. What else can
> > I check to rectify the problem?
> At what revs is it misfiring? No way of making a meaningful carb
> diagnosis without this info.
> Has the bike been laid up for any length of time?
Misfire between 4000 - 5000 rpm
Posted by Rob Kleinschmidt on November 3, 2009, 2:07 pm
> I have a Honda Shadow VT1100C 1996 problem, when I accelerate and on a
> certain rev count the bike is miss firing (losing power) when give
> more petrol it go past the miss fire problem. I did replace sparkplugs
> change petrol and oil filters but problem still exists. What else can
> I check to rectify the problem?
As TOG had already asked, what RPM did it miss at ?
When you pulled the plugs, were the electrodes on the
old plugs all the same color ? What color ?
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> certain rev count the bike is miss firing (losing power) when give
> more petrol it go past the miss fire problem. I did replace sparkplugs
> change petrol and oil filters but problem still exists. What else can
> I check to rectify the problem?